NEET Test Series from KOTA - 10 Papers In MS WORD
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WAVES
172241
A point source emits sound equally in all directions in a non-absorbing medium. Two points $P$ and $Q$ are at distances of $2 \mathrm{~m}$ and $3 \mathrm{~m}$ respectively from the source. The ratio of the intensities of the waves at $P$ and $Q$ is
172242
The equation of a simple harmonic wave is given by $y=5 \sin \frac{\pi}{2}(100 t-x)$, where $x$ and $y$ are in meter and time is in second. The period of the wave in second will be
1 0.04
2 0.01
3 1
4 5
Explanation:
A Given, Simple harmonic wave, $\quad y=5 \sin \frac{\pi}{2}(100 t-x)$ $\mathrm{y}=5 \sin \left(\frac{100 \pi}{2} \mathrm{t}-\frac{\pi}{2} \mathrm{x}\right)$ By comparing from general equation $\mathrm{y}=\mathrm{A} \sin (\omega \mathrm{t}-\mathrm{kx})$ $\omega =\frac{100 \pi}{2}$ $\frac{2 \pi}{\mathrm{T}}=50 \pi {\left[\because \omega=\frac{2 \pi}{\mathrm{T}}\right]}$ $\mathrm{T}=0.04 \mathrm{sec}$
MHT-CET 2020
WAVES
172243
The speed of wave in a medium is $650 \mathrm{~m} / \mathrm{s}$. If 3500 waves are passing through a point in the medium in $1.67 \mathrm{~min}$, then its wavelength will be:
1 $16.25 \mathrm{~m}$
2 $14.29 \mathrm{~m}$
3 $18.57 \mathrm{~m}$
4 $20.50 \mathrm{~m}$
Explanation:
C Given, $\mathrm{v}_{\text {wave }}=650 \mathrm{~m} / \mathrm{s}$ Frequency of the wave $(f)=\frac{3500}{1.67 \times 60}$ $f=\frac{3500}{100.2}$ $f = 35$ Now, Wavelength of the wave $(\lambda)=\frac{\mathrm{v}}{\mathrm{f}}$ $\lambda=\frac{650}{35}$ $\lambda=18.57 \mathrm{~m}$
JCECE-2003
WAVES
172244
Assertion: Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Reason: Wavelength is the distance between two nearest particles in phase.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion .
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
B Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Wavelength is the distance between two nearest point in phase. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
172241
A point source emits sound equally in all directions in a non-absorbing medium. Two points $P$ and $Q$ are at distances of $2 \mathrm{~m}$ and $3 \mathrm{~m}$ respectively from the source. The ratio of the intensities of the waves at $P$ and $Q$ is
172242
The equation of a simple harmonic wave is given by $y=5 \sin \frac{\pi}{2}(100 t-x)$, where $x$ and $y$ are in meter and time is in second. The period of the wave in second will be
1 0.04
2 0.01
3 1
4 5
Explanation:
A Given, Simple harmonic wave, $\quad y=5 \sin \frac{\pi}{2}(100 t-x)$ $\mathrm{y}=5 \sin \left(\frac{100 \pi}{2} \mathrm{t}-\frac{\pi}{2} \mathrm{x}\right)$ By comparing from general equation $\mathrm{y}=\mathrm{A} \sin (\omega \mathrm{t}-\mathrm{kx})$ $\omega =\frac{100 \pi}{2}$ $\frac{2 \pi}{\mathrm{T}}=50 \pi {\left[\because \omega=\frac{2 \pi}{\mathrm{T}}\right]}$ $\mathrm{T}=0.04 \mathrm{sec}$
MHT-CET 2020
WAVES
172243
The speed of wave in a medium is $650 \mathrm{~m} / \mathrm{s}$. If 3500 waves are passing through a point in the medium in $1.67 \mathrm{~min}$, then its wavelength will be:
1 $16.25 \mathrm{~m}$
2 $14.29 \mathrm{~m}$
3 $18.57 \mathrm{~m}$
4 $20.50 \mathrm{~m}$
Explanation:
C Given, $\mathrm{v}_{\text {wave }}=650 \mathrm{~m} / \mathrm{s}$ Frequency of the wave $(f)=\frac{3500}{1.67 \times 60}$ $f=\frac{3500}{100.2}$ $f = 35$ Now, Wavelength of the wave $(\lambda)=\frac{\mathrm{v}}{\mathrm{f}}$ $\lambda=\frac{650}{35}$ $\lambda=18.57 \mathrm{~m}$
JCECE-2003
WAVES
172244
Assertion: Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Reason: Wavelength is the distance between two nearest particles in phase.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion .
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
B Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Wavelength is the distance between two nearest point in phase. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
172241
A point source emits sound equally in all directions in a non-absorbing medium. Two points $P$ and $Q$ are at distances of $2 \mathrm{~m}$ and $3 \mathrm{~m}$ respectively from the source. The ratio of the intensities of the waves at $P$ and $Q$ is
172242
The equation of a simple harmonic wave is given by $y=5 \sin \frac{\pi}{2}(100 t-x)$, where $x$ and $y$ are in meter and time is in second. The period of the wave in second will be
1 0.04
2 0.01
3 1
4 5
Explanation:
A Given, Simple harmonic wave, $\quad y=5 \sin \frac{\pi}{2}(100 t-x)$ $\mathrm{y}=5 \sin \left(\frac{100 \pi}{2} \mathrm{t}-\frac{\pi}{2} \mathrm{x}\right)$ By comparing from general equation $\mathrm{y}=\mathrm{A} \sin (\omega \mathrm{t}-\mathrm{kx})$ $\omega =\frac{100 \pi}{2}$ $\frac{2 \pi}{\mathrm{T}}=50 \pi {\left[\because \omega=\frac{2 \pi}{\mathrm{T}}\right]}$ $\mathrm{T}=0.04 \mathrm{sec}$
MHT-CET 2020
WAVES
172243
The speed of wave in a medium is $650 \mathrm{~m} / \mathrm{s}$. If 3500 waves are passing through a point in the medium in $1.67 \mathrm{~min}$, then its wavelength will be:
1 $16.25 \mathrm{~m}$
2 $14.29 \mathrm{~m}$
3 $18.57 \mathrm{~m}$
4 $20.50 \mathrm{~m}$
Explanation:
C Given, $\mathrm{v}_{\text {wave }}=650 \mathrm{~m} / \mathrm{s}$ Frequency of the wave $(f)=\frac{3500}{1.67 \times 60}$ $f=\frac{3500}{100.2}$ $f = 35$ Now, Wavelength of the wave $(\lambda)=\frac{\mathrm{v}}{\mathrm{f}}$ $\lambda=\frac{650}{35}$ $\lambda=18.57 \mathrm{~m}$
JCECE-2003
WAVES
172244
Assertion: Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Reason: Wavelength is the distance between two nearest particles in phase.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion .
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
B Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Wavelength is the distance between two nearest point in phase. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
WAVES
172241
A point source emits sound equally in all directions in a non-absorbing medium. Two points $P$ and $Q$ are at distances of $2 \mathrm{~m}$ and $3 \mathrm{~m}$ respectively from the source. The ratio of the intensities of the waves at $P$ and $Q$ is
172242
The equation of a simple harmonic wave is given by $y=5 \sin \frac{\pi}{2}(100 t-x)$, where $x$ and $y$ are in meter and time is in second. The period of the wave in second will be
1 0.04
2 0.01
3 1
4 5
Explanation:
A Given, Simple harmonic wave, $\quad y=5 \sin \frac{\pi}{2}(100 t-x)$ $\mathrm{y}=5 \sin \left(\frac{100 \pi}{2} \mathrm{t}-\frac{\pi}{2} \mathrm{x}\right)$ By comparing from general equation $\mathrm{y}=\mathrm{A} \sin (\omega \mathrm{t}-\mathrm{kx})$ $\omega =\frac{100 \pi}{2}$ $\frac{2 \pi}{\mathrm{T}}=50 \pi {\left[\because \omega=\frac{2 \pi}{\mathrm{T}}\right]}$ $\mathrm{T}=0.04 \mathrm{sec}$
MHT-CET 2020
WAVES
172243
The speed of wave in a medium is $650 \mathrm{~m} / \mathrm{s}$. If 3500 waves are passing through a point in the medium in $1.67 \mathrm{~min}$, then its wavelength will be:
1 $16.25 \mathrm{~m}$
2 $14.29 \mathrm{~m}$
3 $18.57 \mathrm{~m}$
4 $20.50 \mathrm{~m}$
Explanation:
C Given, $\mathrm{v}_{\text {wave }}=650 \mathrm{~m} / \mathrm{s}$ Frequency of the wave $(f)=\frac{3500}{1.67 \times 60}$ $f=\frac{3500}{100.2}$ $f = 35$ Now, Wavelength of the wave $(\lambda)=\frac{\mathrm{v}}{\mathrm{f}}$ $\lambda=\frac{650}{35}$ $\lambda=18.57 \mathrm{~m}$
JCECE-2003
WAVES
172244
Assertion: Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Reason: Wavelength is the distance between two nearest particles in phase.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion .
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
B Speed of wave $=\frac{\text { Wave length }}{\text { Time period }}$ Wavelength is the distance between two nearest point in phase. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.